import java.util.Scanner;

public class NSTEPSNestedIF {
	public static void main(String args[]) {
		Scanner in = new Scanner(System.in);

		// Enter number of testcases;
		int tescases = in.nextInt();

		while (tescases != 0) {
			int xCoord = in.nextInt();
			int yCoord = in.nextInt();
			
			if (((xCoord == yCoord) && ((xCoord % 2) == 0) && ((yCoord % 2) == 0))
					|| ((Math.abs(xCoord - yCoord) == 2) && ((xCoord % 2) == 0) && ((yCoord % 2) == 0))) {
				System.out.println(xCoord + yCoord);
			} else if (((xCoord == yCoord) && ((xCoord % 2) != 0) && ((yCoord % 2) != 0))
					|| ((Math.abs(xCoord - yCoord) == 2) && ((xCoord % 2) != 0) && ((yCoord % 2) != 0))) {
				System.out.println(xCoord + yCoord - 1);
			} else {
				System.out.println("No Number");
			}
			tescases--;
		}
	}
}
